iOS 集成测试随机崩溃：与 backboardd 通信时遇到 XPC 错误
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【中文标题】iOS 集成测试随机崩溃：与 backboardd 通信时遇到 XPC 错误【英文标题】：iOS Integration Tests randomly crash: Encountered an XPC error while communicating with backboardd 【发布时间】：2014-01-23 21:58:15 【问题描述】：在针对服务器运行带有实时请求的集成测试时，有时我会遇到以下崩溃。有人知道为什么吗？
我目前在 OS X Mavericks 上并在 ios 7.0.3 SDK 和 Jenkins 上运行这些测试。
2014-01-23 14:55:47.178 xctest[74229:303] 200 <- https://site/30012.zipjson?deltadate=2014-02-22T16%3A31%3A56.000Z&encrypt=N
2014-01-23 14:55:47.186 xctest[74229:303] GET -> https://site/30012.zipjson?deltadate=2014-02-22T16%3A31%3A56.000Z&encrypt=N
2014-01-23 14:55:52.456 xctest[74229:303] 200 <- https://site/30012.zipjson?deltadate=2014-02-22T16%3A31%3A56.000Z&encrypt=N
2014-01-23 14:55:52.467 xctest[74229:303] GET -> https://site/30012.zipjson?deltadate=2014-02-22T16%3A31%3A56.000Z&encrypt=N
2014-01-23 14:55:52.784 xctest[74229:270b] Encountered an XPC error while communicating with backboardd: <error: 0x15bb6a4> count = 1, contents =
"XPCErrorDescription" => <string: 0x15bb884> length = 18, contents = "Connection invalid"
2014-01-23 14:55:52.784 xctest[74229:2e0f] TASK-ASSERT: cfurlcache - ProcessCacheTask - FAILED to get task-assertion, going commando with 2 items to process.
2014-01-23 14:55:56.470 xctest[74229:303] 200 <- https:/site/30012.zipjson?deltadate=2014-02-22T16%3A31%3A56.000Z&encrypt=N
2014-01-23 14:55:56.518 xctest[74229:303] GET -> https://site/30012.zipjson?deltadate=2014-02-22T16%3A31%3A56.000Z&encrypt=N
2014-01-23 14:56:00.836 xctest[74229:303] 200 <- https://site/30012.zipjson?deltadate=2014-02-22T16%3A31%3A56.000Z&encrypt=N
2014-01-23 14:56:00.876 xctest[74229:303] GET -> https://site/30012.zipjson?deltadate=2014-02-22T16%3A31%3A56.000Z&encrypt=N
2014-01-23 14:56:02.785 xctest[74229:2e0f] TASK-ASSERT: cfurlcache - ProcessCacheTask - FAILED to get task-assertion, going commando with 2 items to process.
2014-01-23 14:56:02.785 xctest[74229:e03] Encountered an XPC error while communicating with backboardd: <error: 0x15bb6a4> count = 1, contents =
"XPCErrorDescription" => <string: 0x15bb884> length = 18, contents = "Connection invalid"
2014-01-23 14:56:07.330 xctest[74229:303] 200 <- https://site/30012.zipjson?deltadate=2014-02-22T16%3A31%3A56.000Z&encrypt=N
2014-01-23 14:56:07.392 xctest[74229:303] GET -> https://site/30012.zipjson?deltadate=2014-02-22T16%3A31%3A56.000Z&encrypt=N
2014-01-23 14:56:12.786 xctest[74229:1703] TASK-ASSERT: cfurlcache - ProcessCacheTask - FAILED to get task-assertion, going commando with 1 items to process.
2014-01-23 14:56:12.786 xctest[74229:270b] Encountered an XPC error while communicating with backboardd: <error: 0x15bb6a4> count = 1, contents =
"XPCErrorDescription" => <string: 0x15bb884> length = 18, contents = "Connection invalid"
Test crashed while running.
CRASH REPORT: xctest_2014-01-23-145619_Jenkinss-Mac-mini.crash
Process: xctest [74229]
Path: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.0.sdk/Developer/usr/bin/xctest
Identifier: xctest
Version: 11
Code Type: X86 (Native)
Parent Process: sim [74182]
Responsible: Terminal [1058]
User ID: 501
Date/Time: 2014-01-23 14:56:12.852 -0600
OS Version: Mac OS X 10.9.1 (13B42)
Report Version: 11
Anonymous UUID: 1E15282E-FD52-64B4-798E-2ADBDF3979B5
Sleep/Wake UUID: 4DAEB09F-C4D4-4A7E-BF75-7C73D217FE3B
Crashed Thread: 7 Dispatch queue: com.apple.backboardservices.processassertion
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x000000003000000c
VM Regions Near 0x3000000c:
__LINKEDIT 000000002010c000-0000000020112000 [ 24K] r--/rwx SM=COW /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.0.sdk/Developer/Library/Frameworks/XCTest.framework/XCTest
-->
__TEXT 000000008fe47000-000000008fe7a000 [ 204K] r-x/rwx SM=COW /usr/lib/dyld
Application Specific Information:
objc_msgSend() selector name: queue_invalidate:
iPhone Simulator (external launch) , iPhone OS 7.0.3 (unknown/11B508)
Thread 0:: Dispatch queue: com.apple.main-thread
0 libsystem_kernel.dylib 0x01794f7a mach_msg_trap + 10
1 libsystem_kernel.dylib 0x0179416c mach_msg + 68
2 CoreFoundation 0x00acbe49 __CFRunLoopServiceMachPort + 169
3 CoreFoundation 0x00ad144d __CFRunLoopRun + 1341
4 CoreFoundation 0x00ad0ac3 CFRunLoopRunSpecific + 467
5 CoreFoundation 0x00ad08db CFRunLoopRunInMode + 123
6 Foundation 0x0009b9c5 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 284
7 Foundation 0x0009b865 -[NSRunLoop(NSRunLoop) runUntilDate:] + 88
8 nLinkIntegrationTests 0x066c1ad1 +[MDTTestHelpers wait:secondsForBlock:] + 449 (MDTTestHelpers.m:27)
9 nLinkIntegrationTests 0x067c802d -[MDTCookieStressTest testTryToBreakAuthentication] + 941 (MDTCookieStressTest.m:39)
10 CoreFoundation 0x00b1fd1d __invoking___ + 29
11 CoreFoundation 0x00b1fc2a -[NSInvocation invoke] + 362
12 XCTest 0x201032bf -[XCTestCase invokeTest] + 212
13 XCTest 0x2010338d -[XCTestCase performTest:] + 111
14 otest-shim-ios.dylib 0x00008d45 XCPerformTestWithSuppressedExpectedAssertionFailures + 172 (otest-shim.m:357)
15 otest-shim-ios.dylib 0x00008c94 XCTestCase_performTest + 32 (otest-shim.m:371)
16 XCTest 0x2010417c -[XCTest run] + 82
17 XCTest 0x20102a44 -[XCTestSuite performTest:] + 139
18 XCTest 0x2010417c -[XCTest run] + 82
19 XCTest 0x20102a44 -[XCTestSuite performTest:] + 139
20 XCTest 0x2010417c -[XCTest run] + 82
21 XCTest 0x20102a44 -[XCTestSuite performTest:] + 139
22 XCTest 0x2010417c -[XCTest run] + 82
23 XCTest 0x20105aa1 +[XCTestProbe runTests:] + 183
24 libobjc.A.dylib 0x007b5737 +[NSObject performSelector:withObject:] + 70
25 xctest 0x0000233e 0x1000 + 4926
26 xctest 0x00002590 0x1000 + 5520
27 xctest 0x00002671 0x1000 + 5745
28 xctest 0x00002007 0x1000 + 4103
29 libdyld.dylib 0x0166370d start + 1
Thread 1:: Dispatch queue: com.apple.libdispatch-manager
0 libsystem_kernel.dylib 0x0179a992 kevent64 + 10
1 libdispatch.dylib 0x013c2f3e _dispatch_mgr_invoke + 238
2 libdispatch.dylib 0x013c2c7a _dispatch_mgr_thread + 60
Thread 2:
0 libsystem_kernel.dylib 0x0179a046 __workq_kernreturn + 10
1 libsystem_pthread.dylib 0x0175ddcf _pthread_wqthread + 372
2 libsystem_pthread.dylib 0x01761cce start_wqthread + 30
Thread 3:
0 libsystem_kernel.dylib 0x0179a046 __workq_kernreturn + 10
1 libsystem_pthread.dylib 0x0175ddcf _pthread_wqthread + 372
2 libsystem_pthread.dylib 0x01761cce start_wqthread + 30
Thread 4:: AFNetworking
0 libsystem_kernel.dylib 0x01794f7a mach_msg_trap + 10
1 libsystem_kernel.dylib 0x0179416c mach_msg + 68
2 CoreFoundation 0x00acbe49 __CFRunLoopServiceMachPort + 169
3 CoreFoundation 0x00ad13b1 __CFRunLoopRun + 1185
4 CoreFoundation 0x00ad0ac3 CFRunLoopRunSpecific + 467
5 CoreFoundation 0x00ad08db CFRunLoopRunInMode + 123
6 Foundation 0x0009b9c5 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 284
7 Foundation 0x000378d1 -[NSRunLoop(NSRunLoop) run] + 82
8 nLinkIntegrationTests 0x068475eb +[AFURLConnectionOperation networkRequestThreadEntryPoint:] + 315 (AFURLConnectionOperation.m:185)
9 Foundation 0x00096597 -[NSThread main] + 76
10 Foundation 0x000964f6 __NSThread__main__ + 1275
11 libsystem_pthread.dylib 0x0175c5fb _pthread_body + 144
12 libsystem_pthread.dylib 0x0175c485 _pthread_start + 130
13 libsystem_pthread.dylib 0x01761cf2 thread_start + 34
Thread 5:: com.apple.NSURLConnectionLoader
0 libsystem_kernel.dylib 0x01794f7a mach_msg_trap + 10
1 libsystem_kernel.dylib 0x0179416c mach_msg + 68
2 CoreFoundation 0x00acbe49 __CFRunLoopServiceMachPort + 169
3 CoreFoundation 0x00ad13b1 __CFRunLoopRun + 1185
4 CoreFoundation 0x00ad0ac3 CFRunLoopRunSpecific + 467
5 CoreFoundation 0x00ad08db CFRunLoopRunInMode + 123
6 Foundation 0x0003a9de +[NSURLConnection(Loader) _resourceLoadLoop:] + 381
7 Foundation 0x00096597 -[NSThread main] + 76
8 Foundation 0x000964f6 __NSThread__main__ + 1275
9 libsystem_pthread.dylib 0x0175c5fb _pthread_body + 144
10 libsystem_pthread.dylib 0x0175c485 _pthread_start + 130
11 libsystem_pthread.dylib 0x01761cf2 thread_start + 34
Thread 6:: com.apple.CFSocket.private
0 libsystem_kernel.dylib 0x01799ace __select + 10
1 CoreFoundation 0x00b0f3eb __CFSocketManager + 875
2 libsystem_pthread.dylib 0x0175c5fb _pthread_body + 144
3 libsystem_pthread.dylib 0x0175c485 _pthread_start + 130
4 libsystem_pthread.dylib 0x01761cf2 thread_start + 34
Thread 7 Crashed:: Dispatch queue: com.apple.backboardservices.processassertion
0 libobjc.A.dylib 0x007b30b2 objc_msgSend + 14
1 BackBoardServices 0x019621db __47-[BKSProcessAssertion queue_registerWithServer]_block_invoke + 197
2 libxpc.dylib 0x01594008 _xpc_connection_call_event_handler + 65
3 libxpc.dylib 0x01593ac5 _xpc_connection_mach_event + 1687
4 libdispatch.dylib 0x013d1590 _dispatch_client_callout4 + 37
5 libdispatch.dylib 0x013c4ef0 _dispatch_mach_cancel_invoke + 61
6 libdispatch.dylib 0x013c415f _dispatch_mach_invoke + 378
7 libdispatch.dylib 0x013bf00f _dispatch_queue_drain + 340
8 libdispatch.dylib 0x013bee7a _dispatch_queue_invoke + 128
9 libdispatch.dylib 0x013bfe1f _dispatch_root_queue_drain + 83
10 libdispatch.dylib 0x013c0137 _dispatch_worker_thread2 + 39
11 libsystem_pthread.dylib 0x0175ddab _pthread_wqthread + 336
12 libsystem_pthread.dylib 0x01761cce start_wqthread + 30
Thread 8:
0 libsystem_kernel.dylib 0x0179a046 __workq_kernreturn + 10
1 libsystem_pthread.dylib 0x0175ddcf _pthread_wqthread + 372
2 libsystem_pthread.dylib 0x01761cce start_wqthread + 30
Thread 7 crashed with X86 Thread State (32-bit):
eax: 0x0d42f710 ebx: 0x01962124 ecx: 0x0197847b edx: 0x30000000
edi: 0x015bb6a4 esi: 0x015bb6a4 ebp: 0xb029ad68 esp: 0xb029ad3c
ss: 0x00000023 efl: 0x00010202 eip: 0x007b30b2 cs: 0x0000001b
ds: 0x00000023 es: 0x00000023 fs: 0x00000023 gs: 0x0000000f
cr2: 0x3000000c
Logical CPU: 2
Error Code: 0x00000004
Trap Number: 14
--------------------------------------------------------------------------------
【问题讨论】：
我在运行带有 Calabash 框架的 ios 测试套件时遇到了类似的情况。测试初始化时，模拟器正在记录“与 backboardd 通信时遇到 XPC 错误”。 Mavericks + ios 7 模拟器也是如此。 我真的希望 7.1 解决这个问题... 我在简单的命令行构建中遇到了相同的潜在错误 (Encountered an XPC error while communicating with backboardd)，但间歇性地。布莱赫。
这可能是 Apple 的问题，我在 iOS 7.0.4 的设备上遇到了这个问题，但在 iOS 7.0 的模拟器中没有导致这个问题。
升级到 iOS 版本 7.0.6 解决了这个问题。
【参考方案1】：
升级到 iOS 版本 7.0.6 解决了这个问题。
【讨论】：
在 7.1.1 中这仍然发生在我身上 我在 7.1.2 中遇到了类似的问题。有什么提示可能导致这种情况吗？以上是关于iOS 集成测试随机崩溃：与 backboardd 通信时遇到 XPC 错误的主要内容，如果未能解决你的问题，请参考以下文章